Try the website http://www.airbnb.com
and put in the search criteria for the city. For example, if you put in the criteria Redwood City, CA and the dates you are requesting, you will get 49 results. They range from private rooms to the entire house. For an entire room/apt, you will get 5 results. It will have reviews of previous renters and their experience with the owners, cleanliness, etc.
Rafael Castro Jr
RE/MAX Star Properties